:root {
  --bg: #f7f7f8;
  --card: #fff;
  --text: #1c1c1f;
  --muted: #6b6b75;
  --border: #e3e3e8;
  --accent: #2f5bea;
  --ok: #1f8a4c;
  --err: #c0392b;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141417;
    --card: #1e1e22;
    --text: #ececf1;
    --muted: #9a9aa5;
    --border: #2e2e35;
    --accent: #6e8ef7;
    --ok: #4cc27f;
    --err: #ef6f61;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
/* Elements with display rules (.stack, .account) must still hide. */
[hidden] { display: none !important; }
body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
main { max-width: 900px; margin: 0 auto; padding: 2rem 1rem 4rem; }
h1 { margin: 0 0 .25rem; }
.top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: start; gap: 1rem; }
.top > div:first-child { flex: 1 1 320px; }
.account { display: flex; align-items: center; gap: .6rem; font-size: .9rem; }
.account img { width: 32px; height: 32px; border-radius: 50%; }
.signin { margin-top: 1.5rem; max-width: 420px; }
h2 { font-size: 1.15rem; margin: 0 0 .75rem; }
h3 { margin: 0; font-size: 1rem; }
.muted { color: var(--muted); }
.error { color: var(--err); }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; margin: 1.5rem 0; }
.card, .panel { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.25rem; }
.card { display: flex; flex-direction: column; }
.card p { flex: 1; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
.panel { margin-top: 1rem; }

.badge { font-size: .75rem; padding: .1rem .5rem; border-radius: 99px; border: 1px solid var(--border); color: var(--muted); white-space: nowrap; }
.badge.on { color: var(--ok); border-color: var(--ok); }

button, .button {
  display: inline-block; font: inherit; text-align: center; text-decoration: none; cursor: pointer;
  padding: .5rem .9rem; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff;
}
button.secondary { background: transparent; color: var(--text); border-color: var(--border); }
button:disabled { opacity: .5; cursor: not-allowed; background: transparent; color: var(--muted); border-color: var(--border); }

.row { display: flex; flex-wrap: wrap; gap: .5rem; align-items: end; }
.stack { display: flex; flex-direction: column; gap: .5rem; margin-top: .75rem; }
.sub { margin: 1.25rem 0 .25rem; font-size: .95rem; }
input, textarea, select { flex: 1 1 200px; font: inherit; padding: .5rem .7rem; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); }
textarea { resize: vertical; }
label { display: flex; flex-direction: column; gap: .2rem; flex: 1 1 200px; color: var(--muted); font-size: .85rem; }
label.check { flex-direction: row; align-items: center; gap: .4rem; flex: none; }
label.check input { flex: none; }
.ok { color: var(--ok); }
.ok .muted { color: var(--muted); }
.actions .card button { align-self: start; }
.actions .result:empty { display: none; }
.area { margin-top: 2rem; }
.area > h2 { font-size: 1.3rem; margin: 0 0 .25rem; }
.area .cards { margin: 1rem 0 0; }
.area .panel { margin-top: 1rem; }
.catalog .result:empty { display: none; }
.saved-sheet { margin: .5rem 0 .5rem; overflow-wrap: anywhere; }
.months { margin: 0 0 .75rem; display: flex; flex-wrap: wrap; align-items: center; gap: .4rem; }
.months select { flex: none; width: auto; padding: .3rem .5rem; }
details { color: var(--muted); }
details summary { cursor: pointer; padding: .25rem 0; }
details .row { margin-top: .5rem; }
.warnings { margin: .5rem 0 0; padding-left: 1.2rem; color: var(--muted); font-size: .9rem; }
.linked { margin-top: 2rem; }
.linked-row { display: flex; justify-content: space-between; align-items: center; gap: .5rem; }
button.small { padding: .25rem .6rem; font-size: .85rem; }

.flash { padding: .75rem 1rem; border-radius: 8px; border: 1px solid; }
.flash.ok { color: var(--ok); }
.flash.error { color: var(--err); }

.result { margin-top: 1rem; }
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: .6rem 0; border-top: 1px solid var(--border); overflow-wrap: anywhere; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; font-size: .9rem; }
td { border: 1px solid var(--border); padding: .3rem .5rem; white-space: nowrap; }
a { color: var(--accent); }